<!DOCTYPE html>
<html style="height: 100%;">
<head>
    <meta charset="utf-8"/>
    <meta name="referrer" content="no-referrer"/>
    <meta name="viewport"
          content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <title>正在建设中</title>
</head>
<body style="margin: 0;height: 100%;background: url('${building}') no-repeat center;background-size: cover">
</body>

</html>